20021112111300 has 72 divisors (see below), whose sum is σ = 60976580061600. Its totient is φ = 5057965163520.

The previous prime is 20021112111289. The next prime is 20021112111311. The reversal of 20021112111300 is 311121112002.

It is an interprime number because it is at equal distance from previous prime (20021112111289) and next prime (20021112111311).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20021112111300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1756232205 + ... + 1756243604.

It is an arithmetic number, because the mean of its divisors is an integer number (846896945300).

Almost surely, 2^{20021112111300} is an apocalyptic number.

20021112111300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021112111300 is an abundant number, since it is smaller than the sum of its proper divisors (40955467950300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021112111300 is a wasteful number, since it uses less digits than its factorization.

20021112111300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3512475845 (or 3512475838 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20021112111300 its reverse (311121112002), we get a palindrome (20332233223302).

The spelling of 20021112111300 in words is "twenty trillion, twenty-one billion, one hundred twelve million, one hundred eleven thousand, three hundred".